While climate change has enjoyed a recent spike in news coverage, journalists face a constant challenge to bring sustained attention to other environmental stories, including resource scarcity, the changing oceans, and demographic change. [Video Below]

What are the environmental implications of changing household sizes? A recent article by Mason Bradbury, M. Nils Peterson, and Jianguo Liu, published in Population and Environment, analyzes data from 213 countries over 400 years and finds the average number of occupants per home tends to decline as population grows. This dynamic, they write, indicates that accommodating housing could prove to be one of “the greatest environmental challenges of the twenty-first century.” As countries develop and urbanize, “according to convergence theory, household size decreases (often from greater than five to less than three).” Other cultural shifts, like increasing divorce rates, urban sprawl driven by rising affluence, decreasing numbers of multigenerational households, and larger houses (in the United States, homes more than doubled in size between 1950 and 2002, according to the article) compound the issue. As population growth continues in parts of the world, these trends pose critical questions for conservation and environmental sustainability, since “households are the end consumers of most natural resources and ecosystem services.”

“If there was a perfect slum, Kibera would be it.” The notoriously overcrowded and underserved settlement in the Kenyan capital of Nairobi captivates the public imagination, engendering visions of urban violence, poverty, and hopelessness, said Caroline Wanjiku Kihato of the University of the Witwatersrand at the Wilson Center on February 18. The area was ravaged by ethnic violence that erupted across the country following Kenya’s disputed 2007 elections, pitting neighbor against neighbor in tribal clashes that killed more than 1,000 people, displaced many thousands more, and provoked an alarming surge in sexual violence.

The Wilson Center’s Urban Sustainability Laboratory, in partnership with USAID, International Housing Coalition, World Bank, and Cities Alliance, is pleased to announce the 5th Annual Urban Poverty Paper Competition for graduate students. The competition calls on students currently enrolled in a Master’s or PhD program to submit paper abstracts on topics relating to urban poverty in the developing world.

The original version of this article, by Kaja Jurczynska, appeared on Population Action International’s All Access blog.

Pakistan is at a crossroads, and not for the reasons you might think.

Against the stunning backdrop of Marojejy National Park, I recently crossed paths with a conservationist from a very different background, working on the opposite side of Madagascar. But, it turns out, the communities we work with face many of the same challenges, and our meeting spawned a new population, health, and environment (PHE) program.